Ultrathin layered double hydroxide (LDH) nanosheets are a promising candidate as the electrode material for energy storage due to the ultrafast mass diffusion and greater specific surface area. As a kind of emerging electrode material, metal nitride plays a vital role in improving the poor conductivity of most supercapacitors. Herein, we design a novel three-dimensional (3D) embedded hierarchical core-shell nanostructure by combining ultrathin CoFe-LDH nanosheets (∼2.5 nm) with porous Cu3N nanowire arrays (NWAs), in which the ultrathin CoFe-LD...
